Where can I get more USA food items?

I live in Australia and I enjoy American Food. I have have had almost all of the common stuff (eg. Dr.Pepper,Cherry Coke,Pop tarts,the fanta's .etc) but there are things I just cannot find eg. Apple Fanta, 5 Gum Flare, 5 Gum Vortex. I was also wondering is Apple Fanta common in the USA or is it harder to get like raspberry Fanta is in Australia.